This article is from 2011 so old news really but not much info around about it:

Lenses that monitor eye health are on the way, and in-eye 3D image displays are being developed too – welcome to the world of augmented
vision

THE next time you gaze deep into someone's eyes, you might be shocked at what you see: tiny circuits ringing their irises, their pupils dancing with
pinpricks of light. These smart contact lenses aren't intended to improve vision. Instead, they will monitor blood sugar levels in people with
diabetes or look for signs of glaucoma.

The lenses could also map images directly onto the field of view, creating head-up displays for the ultimate augmented reality experience, without
wearing glasses or a headset. To produce such lenses, researchers are merging transparent, eye-friendly materials with microelectronics. Smart contact lenses for health and
head-up displays

I stumbled upon this info while I was looking for information about Contact Lens Displays with Transparent Circuitry.

This one from 2008:

Electronic contact lens
debuts
"Looking through a completed lens, you would see what the display is generating superimposed on the world outside, but there is much to be done before
we have a fully functional display for human use," said EE Babak Parviz, a professor of electrical engineering at the University of Washington. "Our
goal [here] was to demonstrate the basic technology, make sure it works and that it's safe."

Researchers have created a single-pixel contact lens which was tested on a live rabbit and showed no adverse effect. The in vivo rabbit tested
lens contains a display which consists of a 5-millimetre-long antenna, a silicon power harvesting and radio integrated circuit, metal interconnects,
insulation layers, and a 750 square micron (one-millionth of a meter) sized transparent sapphire chip containing a custom micro LED.

A tiny illuminated section in the center of the device is activated by a radio transmitter, causing the spot to light up. Unfortunately, while
the range of the display was about one meter in free space, that range was reduced to about two centimeters when it was placed on the rabbit’s
eye.

Some of those 'abduction stories come to mind', yanno, all the probing and testing. I think some of this technology is scary. Is it possible that
guinea pig humans maybe walking around with these kinds of lenses?

A microchip developed by scientists has restored the sight of nine blind people suffering from a degenerative disease after it was inserted into
their eyes. The implant, named the Alpha-IMS, is placed under the retina, the inner lining of the eye. The device essentially replaces degenerated
light-sensitive rod and cone cells of patients born with the hereditary condition retinitis pigmentosa (RP).

The implant is only about 3 millimeters long by 3 millimeters wide, and less than 100 microns thick, making it thinner than the average diameter of a
human hair. Despite its tiny size, the microchip is loaded with 1,500 light detectors, which transmit electrical impulses through a patient’s nerves
to generate a colorless 1,500-pixel image. In contrast, other visual implants provide images with significantly less than 100 pixels.

Tons of products already use MEMS, but it's just the start. Before October, patients will be wearing contact lenses equipped with MEMS to test for
glaucoma.

Obviously a good thing for the medical world but could be used for other purposes, yanno, like surveiling the public?

This one is from 2010:
The Future Digital Camera May Not Need A Viewfinder or LCD At All If You Wear These

Imagine wearing contact lenses that allowed you to zoom in on far-off scenes, have useful facts pop into their field of view, or create virtual
crosshairs. Researchers at the University of Washington are working on imprinting an electronic circuit and lights at macroscopic scales onto
flexible, biologically safe contact lenses that should allow the wearer to see a virtual display.

Regardless of misuse, it still amazes me how far things have come.
A lot the things I hoped would be created as a child have been created and some of the things being developed blow my mind, not this so much but it is
still a great technological breakthrough after another.

yes I laughed when I read the article from 2010 stating 'the future digital camera' and when you consider how quickly technology has advanced, I'd be
confident in suggesting that by the year 2013, this R & D would be already achieved.

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